Seat belts
Adjusting the driver's and front-
passenger seat belt .........................53
Belt force limiters ............................ 55
Cleaning ......................................... 285
Correct usage .................................. 52
Emergency Tensioning Devices ....... .55
Fastening ......................................... 53
Important safety guidelines .............51
Releasing ......................................... 54
Safety guidelines ............................. 39
Switching belt adjustment on/off
(on-board computer) ......................206
Warning lamp ................................. 240
Warning lamp (function) ................... 54
Seats
Adjusting (electrically) .....................98
Adjusting (manually). .......................98
Adjusting the 4-way lumbar
support ............................................ 99
Adjusting the head restraint ............99
Cleaning the cover .........................285
Correct driver's seat position ........... 96
Important safety notes ....................97
Overview .......................................... 97
Seat heating problem ....................100
Storing settings (memory function) 105
Switching AIRSCARF on/off ..........100
Switching seat heating on/off .........99
Selector lever
Cleaning ......................................... 284
Sensors (cleaning instructions) .......283
Service menu (on-board computer) .201
Service products Brake fluid ..................................... 347
Coolant (engine) ............................ 347
Engine oil ....................................... 346
Fuel ................................................ 344
Important safety notes ..................344
Refrigerant (air-conditioning
system) .......................................... 349
Washer fluid .................................. .348
Settings
Factory (on-board computer) .........202
On-board computer .......................202
Setting the air distribution ...............130
Setting the airflow ............................130
SETUP (on-board computer) .............207Side impact air bag
.............................43
Side marker lamp Changing bulbs (rear) ....................116
Side marker lamp (display
message) ............................................ 223
Side windows Cleaning ......................................... 282
Convenience closing feature ............84
Important safety information ...........82
Opening/closing (all) .......................83
Opening/closing (front) ...................82
Overview .......................................... 82
Problem (malfunction) .....................86
Resetting ......................................... 84
SmartKey
Changing the battery .......................73
Changing the programming .............71
Checking the battery .......................73
Convenience opening feature ..........83
Display message ............................ 238
Door central locking/unlocking .......70
Important safety notes ....................70
Loss ................................................. 75
Mechanical key ................................ 72
Opening/closing the roof ................88
Overview .......................................... 70
Positions (ignition lock) .................139
Problem (malfunction) .....................75
Starting the engine ........................142
Snow chains ...................................... 309
Sockets Center console .............................. 259
General notes ................................ 258
Under the armrest .........................259
Spare wheel
Stowing .......................................... 338
see Emergency spare wheel
Specialist workshop ............................ 24
Special seat belt retractor .................. 58
Speed, controlling see Cruise control
Speedometer
Activating/deactivating the
additional speedometer .................203
Digital ............................................ 196
In the Instrument cluster .................29
Segments ...................................... 193
Selecting the unit of measurement 202 Index
15
PRE-SAFE
®
(anticipatory occupant
protection system)
Introduction i
AMG vehicles do not include the PRE-
SAFE ®
system.
All vehicles (except AMG vehicles): the
PRE-SAFE ®
system is only available in
vehicles with DISTRONIC PLUS.
PRE-SAFE ®
takes preemptive measures to
protect occupants in certain hazardous
situations.
Important safety notes !
Make sure that there are no objects in the
footwell or behind the seats when resetting
the seats. There is a risk that the seats
and/or the objects could be damaged.
Despite your vehicle being equipped with the
PRE-SAFE ®
system, the possibility of
personal injuries occurring as a result of an
accident cannot be eliminated.
Always adapt your driving style to suit the
prevailing road and weather conditions and
maintain a safe distance from the vehicle in
front. Drive carefully.
Function PRE-SAFE
®
intervenes:
R in emergency braking situations, e.g. when
BAS is activated.
R in critical driving situations, e.g. when
physical limits are exceeded and the
vehicle understeers or oversteers severely.
R on vehicles with DISTRONIC PLUS: if
BAS PLUS brakes hard or the radar sensor
system detects an imminent danger of
collision in certain situations. PRE-SAFE
®
takes the following measures
depending on the hazardous situation
detected:
R the seat belts are pre-tensioned.
R if the vehicle skids, the side windows are
closed so that only a small gap remains.
R vehicles with the memory function for
the front-passenger seat: the front-
passenger seat is adjusted if it is in an
unfavorable position.
If the hazardous situation passes without
resulting in an accident, PRE-SAFE ®
slackens
the belt pre-tensioning. All settings made by
PRE-SAFE ®
can then be reversed.
If the seat belts are not released:
X When the vehicle is stationary, move the
backrest or seat back slightly.
The seat belt pre-tensioning is reduced and
the locking mechanism is released.
The seat-belt adjustment is an integral part of
the PRE-SAFE ®
convenience function. More
information about seat-belt adjustment can
be found under "Seat-belt adjustment"
(Y page 53). NECK-PRO head restraints
Important safety notes G
WARNING
Do not secure any objects (e.g. coat hangers)
on the NECK-PRO head restraints. Otherwise,
the NECK-PRO head restraints may not
function properly, or in the event of a rear-end
collision may not be able offer the level of
protection they are designed to provide. G
WARNING
Seat or head restraint covers can cause a
malfunction when the NECK-PRO head
restraints are activated or when the side
impact air bags are deployed, or they can
prevent this completely. The NECK-PRO head
restraints or side impact air bags can 50
Occupant safetySafety
Useful information
..............................96
Correct driver's seat position ............96
Seats .................................................... 97
Steering wheel .................................. 100
Mirrors ............................................... 103
Memory function .............................. 105 95Seats, steering wheel and mirrors
Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Read the information on qualified
specialist workshops: (Y page 24).Correct driver's seat position
X
Observe the safety guidelines on seat
adjustment (Y page 97).
X Make sure that seat 0087is adjusted
properly.
Manual seat adjustment (Y page 98)
Electrical seat adjustment (Y page 98)
When adjusting the seat, make sure that:
R you are as far away from the driver's air bag
as possible.
R you are sitting in a normal upright position.
R you can fasten the seat belt properly. R
you have moved the backrest to an almost
vertical position.
R you have set the seat cushion angle so that
your thighs are gently supported.
R you can depress the pedals properly.
X Check whether the head restraint is
adjusted properly.
When doing so, make sure that you have
adjusted the head restraint so that the back
of your head is supported at eye level by
the center of the head restraint.
X Observe the safety guidelines on steering
wheel adjustment (Y page 100).
X Make sure that steering wheel 0043is
adjusted properly.
Adjusting the steering wheel manually
(Y page 101)
Adjusting the steering wheel electrically
(Y page 101)
When adjusting the steering wheel, make
sure that:
R you can hold the steering wheel with your
arms slightly bent.
R you can move your legs freely.
R you can see all the displays in the
instrument cluster clearly.
X Observe the safety guidelines for seat belts
(Y page 51).
X Check whether you have fastened seat
belt 0044properly (Y page 53).
The seat belt should:
R fit snugly across your body
R be routed across the middle of your
shoulder
R be routed in your pelvic area across the hip
joints
X Before starting off, adjust the rear-view
mirror and the exterior mirrors
(Y page 103) in such a way that you have
a good view of road and traffic conditions.
X Vehicles with a memory function: save
the seat, steering wheel and exterior mirror
settings (Y page 105). 96
Correct driver's seat positionSeats, steering wheel and mirrors
R
clean the seat covers as recommended;
see the "Interior care" section.
R do not transport heavy loads on the
seats. Do not place sharp objects on the
seat cushions, e.g. knives, nails or tools.
The seats should only be occupied by
passengers, if possible.
R when the seat heating is in operation, do
not cover the seats with insulating
materials, e.g. blankets, coats, bags,
seat covers, child seats or booster seats.
! Make sure that there are no objects in the
footwell or behind the seats when resetting
the seats. There is a risk that the seats
and/or the objects could be damaged.
i The head restraints are installed with the
NECK-PRO system (Y page 50). For this
reason, it is not possible to remove the
head restraints from the seats.
For more information, contact a qualified
specialist workshop. Adjusting the seats manually
X
To set seat fore-and-aft adjustment: lift
lever 0043and slide the seat forwards or
backwards.
X Release lever 0043again.
Make sure that you hear the seat engage in
position. X
To adjust the backrest angle: relieve the
pressure on the backrest.
X Pull handle 0044and adjust the backrest to
the desired angle.
X Release handle 0044again.
The backrest must audibly engage.
X To adjust the seat height: pull handle
0087 upwards or push it down repeatedly
until the seat has reached the desired
height. Adjusts the seats electrically
0043
Backrest angle
0044 Seat fore-and-aft adjustment
0087 Seat cushion angle
0085 Seat height
i You can store the seat settings using the
memory function (Y page 105).98
SeatsSeats, steering wheel and mirrors
If somebody becomes trapped:
R
press one of the memory function position
buttons, or
R move the switch for steering wheel
adjustment in the opposite direction to that
in which the steering wheel is moving.
The adjustment process is stopped. G
WARNING
When the EASY-ENTRY/EXIT feature adjusts
the steering wheel and the driver's seat, you
and other vehicle occupants – particularly
children – could become trapped. There is a
risk of injury.
While the EASY-ENTRY/EXIT feature is
making adjustments, make sure that no one
has any body parts in the sweep of the seat
and the steering wheel.
If somebody becomes trapped:
R press one of the memory function position
buttons, or
R press one of the memory function memory
buttons, or
R move the switch for steering wheel
adjustment in the opposite direction to that
in which the steering wheel is moving
The adjustment process is stopped. G
WARNING
If you use openings in the bodywork or
detachable parts as steps, you could:
R slip and/or fall
R damage the vehicle and cause yourself to
fall.
There is a risk of injury.
Always use secure climbing aids, e.g. a
suitable ladder.
The EASY-ENTRY/EXIT feature makes getting
in and out of your vehicle easier.
You can activate and deactivate the EASY-
ENTRY/EXIT feature in the on-board
computer (Y page 205). Position of the steering wheel when the
EASY-ENTRY/EXIT feature is active The steering wheel swings upwards when
you:
R
remove the SmartKey from the ignition lock
R open the driver's door with KEYLESS-GO in
position 1
R open the driver's door and the SmartKey is
in position 0or 1in the ignition lock
i The steering wheel only moves upwards if
it has not already reached the upper end
stop.
Position of the steering wheel for
driving The steering wheel is moved to the last
selected position when:
R
the driver's door is closed
R you insert the SmartKey into the ignition
lock
or
R you press the Start/Stop button once on
vehicles with KEYLESS-GO
When you close the driver's door with the
ignition switched on, the steering wheel is
also automatically moved to the previously
set position.
The last position of the steering wheel is
stored when you switch off the ignition or
when you store the setting with the memory
function ( Ypage 105).
Crash-responsive EASY-EXIT feature If the crash-responsive EASY-EXIT feature is
triggered in an accident, the steering column
will move upwards when the driver's door is
opened. This occurs irrespective of the
position of the SmartKey in the ignition lock.
This makes it easier to exit the vehicle and
rescue the occupants.
The crash-responsive EASY-EXIT feature is
only operational if the EASY-EXIT/ENTRY
feature is activated in the on-board computer. 102
Steering wheelSeats, steering wheel and mirrors
X
Make sure that the vehicle is stationary and
that the SmartKey is in position 2in the
ignition lock.
X Press button 0044for the exterior mirror on
the front-passenger side.
X Engage reverse gear.
The exterior mirror on the front-passenger
side moves to the preset parking position.
X Use adjustment button 0087to adjust the
exterior mirror to a position that allows you
to see the rear wheel and the curb.
The parking position is stored.
i If you shift the transmission to another
position, the exterior mirror on the front-
passenger side returns to the driving
position.
Using the memory button You can position the front-passenger side
exterior mirror in such a way that you can see
the rear wheel on that side as soon as you
engage reverse gear. This setting can be
stored using memory button M0085.
X Make sure that the SmartKey is in position
2 in the ignition lock.
X With the exterior mirror on the front-
passenger side activated, use adjustment
button 0087to adjust the exterior mirror. In
the exterior mirror, the rear wheel and the
curb should be visible. X
Press memory button M0085 and one of the
arrows on adjustment button 0087within
three seconds.
The parking position is stored if the exterior
mirror does not move.
X If the mirror moves out of position, repeat
the steps.
Calling up a stored parking position
setting X
Turn the SmartKey to position 2in the
ignition lock.
X Adjust the exterior mirror on the front-
passenger side using button 0044.
X Engage reverse gear.
The exterior mirror on the front-passenger
side moves to the stored parking position.
The exterior mirror on the front-passenger
side moves back to its original position:
R as soon as you exceed a speed of 9 mph
(15 km/h)
R if you press button 0043for the exterior
mirror on the driver's side Memory function
Storing settings
G
WARNING
If you use the memory function on the driver's
side while driving, you could lose control of
the vehicle as a result of the adjustments
being made. There is a risk of an accident. Memory function
105Seats, steering wheel and mirrors
Z
Only use the memory function on the driver's
side when the vehicle is stationary. G
WARNING
When the memory function adjusts the seat
or steering wheel, you and other vehicle
occupants – particularly children – could
become trapped. There is a risk of injury.
While the memory function is making
adjustments, make sure that no one has any
body parts in the sweep of the seat or steering
wheel. If somebody becomes trapped,
immediately release the memory function
position button. The adjustment process is
stopped. G
WARNING
When the memory function adjusts the seat,
you and other vehicle occupants – particularly
children – could become trapped. There is a
risk of injury.
While the memory function is making
adjustments, make sure that no one has any
body parts in the sweep of the seat. If
somebody becomes trapped, immediately
release the memory function position button.
The adjustment process is stopped. G
WARNING
Children could become trapped if they
activate the memory function, particularly
when unattended. There is a risk of injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle. X
Adjust the seat electrically (Y page 98).
X On the driver's side, adjust the steering
wheel (Y page 101) and the exterior mirrors
(Y page 103).
X Press memory button Mand one of the
storage position buttons 1,2or 3within
three seconds.
The settings are stored in the selected
preset position. A tone sounds when the
settings have been completed. Calling up a stored setting
X Press and hold the relevant storage
position button 1,2or 3until the seat,
steering wheel and exterior mirrors are in
the stored position.
i The setting procedure is interrupted as
soon as you release the storage position
button. 106
Memory functionSeats, steering wheel and mirrors